code: def op(self, request):
      return request.param
  
imports: import operator
  import numpy
  import pytest
  from pandas.core.dtypes.common import is_list_like
  import pandas
  from pandas import Categorical, Index, Interval, IntervalIndex, Period, Series, Timedelta, Timestamp, date_range, period_range, timedelta_range
  import pandas._testing
  from pandas.core.arrays import BooleanArray, IntervalArray
  from pandas.tests.arithmetic.common import get_upcast_box
label_desc: Use image node_id 1 for calling the TestComparison obj's underlying member method code with example usage: obj.op(request) and returns: request